The 16-year old singer was reportedly almost put in handcuffs by the officer, who was left wet and angry after Justin threw the water-balloon at him.
However, lucky for JB his bodyguard was on hand to talk the fuming officer out of arresting the teen sensation moments before he was due on stage in Maryland earlier this week.
A source told a local news station that the One Time hitmaker was: "horsing around with members of his staff outside a trailer, when one of the balloons hit a trooper's gun belt and burst, and the other brushed a trooper on the chest but didn't burst." Justin's behaviour has been described as 'inappropriate' by police but no further action against the teen sensation will be taken.
